Retrograde conduction of ventricular extrasystoles with consideration of return extrasystoles.
نویسندگان
چکیده
منابع مشابه
Upper atrio-ventricular nodal beats precipitated by ventricular extrasystoles with retrograde conduction.
The patient was a 75-year-old man with a four years' history of nocturnal attacks of cardiac asthma, increasing dyspncea, and cedema of the feet. On admission he was found to be suffering from hypertensive cardiac failure. The blood pressure was 210/120 mm. Hg. The heart action was regular, rate 112. Radiological examination showed enlargement of the heart with evidence of pulmonary congestion....
متن کاملCharacteristics of ventricular extrasystoles and their prognostic importance: a reappraisal of their method of classification.
The concept of two different types of extrasystoles, parasystolic and coupled, depends upon two distinguishing characteristics of these beats. The characteristics of the parasystolic extrasystoles are the invariability of the ectopic cycle together with their independence from the basic rhythm. Coupled extrasystoles demonstrate a dependence upon the basic rhythm although they may express some d...
متن کاملReciprocal ventricular extrasystoles.
An impulse originating in the A-V node or ventricles may be conducted retrogradely through the A-V node. The retrograde impulse may, under certain circumstances, return anterogradely through the A-V node to the ventricles giving rise to a reciprocal or return extrasystole. One explanation for this re-entry phenomenon is based on the concept of a functional vertical division or longitudinal diss...
متن کاملEffect of extrasystoles on idioventricular rhythm.
Ventricular extrasystoles exert a variable effect on idioventricular rhythm. The postextrasystolic, or the "returning," cycle may be unchanged, or it may be shorter or longer than the dominant cycle. The factors responsible for these different responses have never been investigated. Therefore, the effect of electrically induced extrasystoles was studied by microelectrode techniques in an in vit...
متن کاملAtrioventricular dissociation with intact retrograde conduction.
When orthograde atrioventricular conduction is completely blocked, the atrial rhythm may be disturbed by retrograde conduction of the idioventricular impulses. The underlying mechanisms in such cases are of physiological interest, as they permit comparison with experimental findings in isolated muscle strips and thereby lead to a better understanding of impulse formation and conduction disturba...
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ورودعنوان ژورنال:
- Diseases of the chest
دوره 41 شماره
صفحات -
تاریخ انتشار 1962